Category 1 horses carry the genes of the fastest horses. Category 2 horses carry the genes of the 2nd fastest, and so forth.

Homebreds – Offspring has at least 1 of parents from the category to qualify.

Category

Winners

Stake Winners

Graded Stake Winners

1

34.59

2.00

0.91

2

33.21

1.79

0.63

3

32.91

1.76

0.77

4

31.82

1.52

0.54

Auto-Gens – Auto-Gen of live stable that carries genes of the defined category.

Category

Winners

Stake Winners

Graded Stake Winners

1

38.68

2.04

0.85

2

36.58

1.90

0.48

3

30.22

0.69

0.40

4

31.73

1.54

0.51

Homebreds – Offspring has both parents from the category to qualify.

Category

Winners

Stake Winners

Graded Stake Winners

1

41.99

2.10

1.31

2

37.28

1.90

0.49

3

32.64

1.63

0.10

4

31.58

0.65

0.65

Auto-Gens – General Auto-Gen Averages.

Winners

Stake Winners

Graded Stake Winners

33.97

1.46

0.51

The numbers in the tables above are percentages and are based off of total foals. The data is limited to the last 2 years and only includes horses created from live stables. Only auto-gens created as 2yos are considered. There is still somewhat limited data especially with the graded stakes data where just a few wins can skew the numbers.

The overall percentages are rising as the overall age of the population rises. This makes sense as more horses have wins now
that they have had more time to get wins.